[SOLVED] query abt unicast

priya81 · 12-16-2007, 09:48 PM

If a client does not know the address of the server, can it unicast a message to the server???

**Cellus** · 12-16-2007, 10:37 PM

Many times a service on a server will broadcast over the network the service which is available, and from that broadcast the client knows the address of the server (all IP packets have both the IP of the recipient [in this case the broadcast IP] and the sender [the server]). The client can also send out a broadcast asking who is providing a service and the server can respond back. This is in regards to services.

You can also, when not in reference to services but on actual network devices/nodes (more fundamentally in networking), use Address Resolution Protocol (ARP) to find out what the IP address is of a node if you know its MAC address, and vice-versa (in the case of Reverse ARP).

priya81 · 12-17-2007, 02:06 AM

Thanks a lot for this.
I got it now.

**Cellus** · 12-17-2007, 11:27 AM

No problem.

12-16-2007, 09:48 PM	#1 (permalink)
priya81 Registered User Join Date: Dec 2007 Posts: 5 OS: xp	[SOLVED] query abt unicast If a client does not know the address of the server, can it unicast a message to the server???

12-16-2007, 10:37 PM	#2 (permalink)
Cellus Moderator Networking Team Join Date: Aug 2006 Location: Canada Posts: 2,633 OS: Windows Vista Business SP1, Windows XP Professional SP3 My System	Re: query abt unicast Many times a service on a server will broadcast over the network the service which is available, and from that broadcast the client knows the address of the server (all IP packets have both the IP of the recipient [in this case the broadcast IP] and the sender [the server]). The client can also send out a broadcast asking who is providing a service and the server can respond back. This is in regards to services. You can also, when not in reference to services but on actual network devices/nodes (more fundamentally in networking), use Address Resolution Protocol (ARP) to find out what the IP address is of a node if you know its MAC address, and vice-versa (in the case of Reverse ARP). __________________ TSF Networking Team HijackThis 5 Step Process Donate!

12-17-2007, 02:06 AM	#3 (permalink)
priya81 Registered User Join Date: Dec 2007 Posts: 5 OS: xp	Re: query abt unicast Thanks a lot for this. I got it now.

12-17-2007, 11:27 AM	#4 (permalink)
Cellus Moderator Networking Team Join Date: Aug 2006 Location: Canada Posts: 2,633 OS: Windows Vista Business SP1, Windows XP Professional SP3 My System	Re: query abt unicast No problem. __________________ TSF Networking Team HijackThis 5 Step Process Donate!